Published at Thursday, 12 December 2019. Tonneau Cover. By Armand Neumann.
These simple ones were called pivot hinges and consisted of a post that fits into a ring or a socket. If you put a post on the top and bottom of each door and a socket in the floor and top of the doorframe, you have a simple door that swings open both ways. Other mountings of them stop the door at a certain point. An example of an ancient pivot hinged door with a stop is a drawbridge. Two massive pivot hinges were mounted on the bottom outside corners of the castle; chains raised the bridge into a door position which was then barred from the inside to hold it in place.
Although they are small pieces of hardware, they will catch the eye if there;s one that doesn;t match. It;s the old truth that no one notices when things are right, but they always seem to see when things are wrong.
Ancient pivot hinges wore out and were subsequently reinforced with metal. Eventually they were made only of metal. As advances in metallurgy made metal stronger, they could carry heavier loads. They were also advancing by being downsized and used in homes; on doors, trunks, and boxes.
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